Value Collection R52001109 Serrated Flange Nut 1/4-28

Product Description

The VALUE COLLECTION R52001109 is a serrated flange nut designed for secure fastening in applications where a built-in washer surface and vibration resistance are required. The serrated bearing face bites into the mating surface to resist loosening under dynamic loads. Manufactured from Grade 2 steel with a zinc-plated finish for basic corrosion resistance, this nut carries a 1/4-28 UNF thread and a nominal flange diameter of 0.594 inches. Hardness is rated at 78-90 HR15N. It is a standard inch-system fastener suited for light-to-medium duty mechanical assemblies across industrial, HVAC, electrical enclosure, and general equipment applications.

This serrated flange nut is used wherever a 1/4-28 UNF threaded fastener is needed and a standard hex nut with a separate washer is not practical or preferred. Common install scenarios include sheet metal panels, equipment enclosures, HVAC cabinet assemblies, and general mechanical fixtures. The integrated serrated flange distributes clamping load and locks against loosening without a separate lock washer. This part is sold individually with a minimum order quantity of 100 units, making it appropriate for shop stock, field kits, or production line replenishment.

Key Features

• 1/4-28 UNF thread for fine-pitch fastening in inch-system assemblies
• Serrated flange face resists loosening under vibration without a separate lock washer
• Grade 2 steel construction with zinc-plated finish for light corrosion protection
• Flange diameter of 0.594 inches distributes clamping load across a broader bearing surface
• Hardness rated 78-90 HR15N for consistent performance in standard mechanical applications
• Width across flats ranges from 0.428 to 0.438 inches, compatible with standard 7/16-inch wrenching

Compatibility

Designed as an OEM-style replacement or stock fastener for any assembly requiring a 1/4-28 UNF serrated flange nut in an inch-measurement system.

Installation Notes

Installation is performed by mechanical technicians, HVAC service professionals, or electricians during panel and enclosure assembly. Power down or de-energize any equipment before fastener work on live assemblies. Use a 7/16-inch wrench or socket to torque to the assembly specification defined by the equipment manufacturer. Do not reuse serrated flange nuts in critical applications once they have been tightened and removed, as serrations may be compromised.